Nut-lock.



J. A. BADGER.

NUT LOCK.

APPLICATION YILED JULY 7.1910

. Patented Nov. 28,1911.

1 I Hull" "HIHH-HWHI" I INVENTOR (Lennon.

JOHN A. BADG B, OF ELLVOOD CITY, PENNSYLVANIA.

Nor-Look.

Specification of 'Letters Patent.

' Patented Nov. 2 ,1911.

Application filed July 7, 1910. Serial No. 570,754.

cited which of simple construction, inexpensive to munufucture, whichcan be reedily applied and also readily removed, end which will securelyhold the not against turning on bolt.

The invention comprises the construction and arrangement of partshereinafter described and claimed. 7

Int-he accompanying drawing Figure 1 is side view of a bolt showing thenut and locking means in position, the nut and locking nieuns'being insection; Fig. 2 is on end view of nut; Fig. 3 is a. transverse sectionthrough the locking key and the cooperating portions of the nut sudbolt; Fi a. detail side view of the locking key; end Fig. is :1 sideview of a'modified form of lockin key showing its condition prior I toapplication.

In the drawing 1 represents a bolt provided with screw threads 2receiving the out 3. The bolt and nut be of any cesircd construction andof any desired. size and form. in carrying out my invention he bolt notmodified in any particular,

' uudthe nut is merely modified to the extent of being provided with ugroove 4c opening nto bore of the nut and extending paruilel to the axisof said bore. The locking member comprises a. key 5 which is adapted tobe driven into the groove in the nut after the latter is on the bolt andbite into or grip the threads of the bolt and thereby hold the nutagainst rotation This key is preferably provided with an acute edge oredges to enable it to more readily bite into or grip the threads of thebolt. As shown in the drawing, said key is grooved on its inner face, asat (5, so as to provide two acute edges 7 which cut into the threads ofthe bolt and prevent the nut from working loose. The outer end of thekey is preferably turned at right angles, as at 8, to lie against theouter face of the nut and present a gib or head to facilitate thedriving of the key and also for engagement a claw implement or the bycausing the cutting edges 7 at the p01 like, to enable the key to bedrawn out when it is desired to remove the nut.

The key 5 shown-in Fig. 5, is bent between its inner and outer ends, thebending being preferably/"somewhat closer to its 111- nor endthun to itsouter end, so that'in its normal or unused condition there is sportion,as at 16, lying inside of the inner longitudinal face of said key; Whenthe key- 18' driven into place the point 11 rides along the bottom ofthe groove in thenut, there-;

mi 10 to more effectively bite into the threads of the bolt. The key ismade of spring or resilient metal and this curved contour also assistsin looking the key from accidental outward escape in case it should beslightly smaller than the groove in the nut.

The key shown in Fig. '5 is provided on its inner face with transversegrooves or notches 9, which when the key is driven in place will, due tothe resiliency of said bent key, engage the threads of theboltundprevent accidental escapement of the key even.

ifthe latter does not have a tight or driven fit in the groove in thenut.

The groove in the nut and the hey are of substantially the some crosssectional contour. This may vary within wide limits. Preferably thegroove is of'concave shape in cross section, slightly more thansemicirg,

culur, as illustrated, and the key of substantiully circular crosssection except for the groove (5 on'the inner face.

With the form of key shown it is not necessary that it have a tight fitin the groove,

since any tendency of thenutto turn on. the

bolt will. cause a rotation of the key in the groove and cause eitherone or the other cutting edge to bite into the threads. Forthe.

same reason the key neednotbe made so large that its edges willmaterially distort.

the threads, us the locking effect would be secured in the manner statedwhenever an effort was made to turn the nut. The consequence is thatwhilethe key will. 'efiectually lock the nut against accidental turning,it does not distort the threads so as to preventthe bolt and nut beingused repeatedly. The opposite walls of the groove ere parallel, and theopposite sides of the key are gin likewise parallel so that no wed gingaction:

is secured when driving the key in place.

In munufacturm the bolt and nut are made in the usual way. vThe groove iis I vent looseness in bolts.

formed by the punch which punches the hole in the nut blank, it merelybeing necessary to provide the punch on one side with a rib formed tothe shape of the desired groove. The tapping of the nut does not affectthis groove. As a consequence there is absolutely no additional cost .inthe manufacture of the bolt and nut. The key Will preferably be madefrom a heavy steel wire which can be drawn with the groove 6 in one faceso as to provide the ribs or acute edges 7 The provision of this groovein the act of drawing the wire adds practically nothing to its cost. Thekeys are made from such wire by simple cutting and bending operations,as will be readily appreciated, so that their cost is practically nomore than that of small nails. The nutlock described can therefore bemanufactured at a very reasonable cost. It

-'is of very simple construction, effectively holds the nut againstturning on the bolt,

' can be readily applied, and can be as readily removed to ermit the nutto be taken from the bolt. T e acute edges of the key do not distort thebolt threads, or at least so little that the nut can'be taken off withan ordinary wrench. p

The key is not applied until the nut is turned fully to the desiredposition. The

lock will bite the bolt at any point around the circumference of thelatter, so that it is possible to draw the nut fully home and pre theparts secured by the What I claim is: 4 1. A nut lock comprising a nutprovided with a groove parallel to its axis, and a key arranged to fitin said groove and provided at each of its inner longitudinal edges withan acute edge arranged to bite the threads of the bolt, said key andgroove being of sub stantially uniform cross section throughout andbeing of such shape in cross section that the key can be rocked on alongitudinal axis.

2. A nut lock comprising .a nut provided with a groove parallel to itsaxis and concave in cross section, and a key arranged to be driven intosaid groove, said keybeing of substantially circular shape in crosssection and provided with a longitudinal groove on its inner edge toform'aplurality of acute edges arranged to bite the threads of the bolt.

A nut lock comprising a nut provided with. a groove parallel to itsaxis, and a key arranged to be driven into said groove, said key in itsnormal state being bent to provide intermediate its ends a portionprojecting toward the axis of the nut and arranged to bite the threadsof the bolt.

4-. A nut lock comprising a nut provided with a groove parallel to itsaxis, and a'key arranged to be driven into said groove, said key beinglongitudinally grooved on the face toward the axis of the nut to providea plurality of acute edges,- and being bent intermediate its ends toprovide a portion projecting toward the axis'of the nut.

5. A nut lock comprising a nut provided with a concave groove parallelto its axis, and a-key arranged to be driven into said groove, said keybeing of substantially circular cross section and longitudinallygroovedon its inner face and having its outer end bent at substantially a rightangle to its body. E

6. A nut lock comprising a nut provided with a groove parallel to itsaxis, and a key arranged to be driven into said groove, said key beingformed.of resilient metal and longitudinally grooved on its'inner faceand bent intermediate its ends to project a porticn toward the axis ofthe nut.

7. A nut lock comprising a nut provided with a groove parallel to itsaxis, and a key arranged to be'driven into said groove, said key in itsnormal state being bent to provide intermediate its ends a portionprojecting toward the axis of the nut and being pro. vided on its innerface with transverse grooves or notches and with a plurality oflongitudinal acute edges arranged to bite the with a groove parallel toits axis and concavein cross section, and a key arranged ta be driveninto said groove, said key being substantially circular in cross sectionand provided with a longitudinal groove on its inner face to form aplurality of acute edges arranged to bite the threads of the bolt, saidkey being formed of,resilient metal and bent intermediate its ends toproject a portioi. toward the axis of the nut.

In testimony whereof, I have hereunto set my hand.

JOHN A. BADGER. Witnesses:

H. D. WIMER, W. F. ST. CLAIR.

